Sessions
Problem
How to use sessions in web.py.
Solution - 0.3 Only!
The web.session module provides session support. Here is a simple application to count using sessions.
import web
urls = (
"/count", "count",
"/reset", "reset"
)
app = web.application(urls, locals())
session = web.session.Session(app, web.session.DiskStore('sessions'), initializer={'count': 0})
class count:
def GET(self):
session.count += 1
return str(session.count)
class reset:
def GET(self):
session.kill()
return ""
if __name__ == "__main__":
app.run()
The session object is loaded with the session data before handling the request and saves the session data after handling the request, if modified.
The optional initializer argument to Session specifies the initial session.
You can use DBStore instead of DiskStore if you prefer to store sessions in database instead of disk. For using DBStore you need to have a table with the following schema.
create table sessions (
session_id char(128) UNIQUE NOT NULL,
atime datetime NOT NULL default current_timestamp,
data text
);
And you need to pass db object and session table name to the constructor of DBStore.
db = web.database(dbn='postgres', db='mydatabase', user='myname', pw='')
store = DBStore(db, 'sessions')
session = web.session.Session(app, store, initializer={'count': 0})